30 CFR 819.21 - Auger mining: Protection of underground mining.

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§ 819.21 Auger mining: Protection of underground mining.
Auger holes shall not extend closer than 500 feet (measured horizontally) to any abandoned or active underground mine workings, except as approved in accordance with § 816.79 of this chapter.

Title 30 published on 2013-07-01

no entries appear in the Federal Register after this date.

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United States Code
U.S. Code: Title 30 - MINERAL LANDS AND MINING